Remove written in clause

Recently we discussed in `rust-bitcoin` the pointlessness of the `\\
Written in ...` clause above the license terms. We came to the
conclusion that:

- It probably wasn't written then and who cares anyway because we patch
files all the time
- It almost certainly wasn't written by just this person because we have
a bunch of contributors
- Use of "the rust bitcoin devs" is just noise and no signal

Remove the "written in" clause if it contains "the rust bitcoin devs" or
Andrew's name (because he was part of the conversation in rust-bitcoin)

Do no remove clauses that have Sanket's name or Maxim's. Its up to them
if they want attribution so we leave it there for now.

Leave Andrew's name in `lib.rs` as a little nod-of-the-head to him as
the original author. I do not know the full relationship between Sanket
and Andrew and who did what so please forgive me Sanket if this is wrong.

Author: tcharding

src/descriptor/bare.rs

@@ -1,4 +1,3 @@
-// Written in 2020 by the rust-miniscript developers
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Bare Output Descriptors

src/descriptor/mod.rs

@@ -1,4 +1,3 @@
-// Written in 2018 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Output Descriptors

src/descriptor/segwitv0.rs

@@ -1,4 +1,3 @@
-// Written in 2020 by the rust-miniscript developers
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Segwit Output Descriptors

src/descriptor/sh.rs

@@ -1,4 +1,3 @@
-// Written in 2020 by the rust-miniscript developers
 // SPDX-License-Identifier: CC0-1.0
 
 //! # P2SH Descriptors

src/descriptor/sortedmulti.rs

@@ -1,4 +1,3 @@
-// Written in 2020 by the rust-miniscript developers
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Sorted Multi

src/expression.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Function-like Expression Language

src/iter/mod.rs

@@ -1,4 +1,3 @@
-// Written in 2023 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Abstract Tree Iteration

src/iter/tree.rs

@@ -1,4 +1,3 @@
-// Written in 2023 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Abstract Trees

src/miniscript/analyzable.rs

@@ -1,4 +1,3 @@
-// Written in 2018 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //!  Miniscript Analysis

src/miniscript/astelem.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! AST Elements

src/miniscript/decode.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Script Decoder

src/miniscript/lex.rs

@@ -1,4 +1,3 @@
-// Written in 2018 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Lexer

src/miniscript/mod.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Abstract Syntax Tree

src/miniscript/satisfy.rs

@@ -1,4 +1,3 @@
-// Written in 2018 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Satisfaction and Dissatisfaction

src/miniscript/types/correctness.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Correctness/Soundness type properties

src/miniscript/types/malleability.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Malleability-related Type properties

src/miniscript/types/mod.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Miniscript Types

src/policy/compiler.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Policy Compiler

src/policy/concrete.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Concrete Policies

src/policy/mod.rs

@@ -1,4 +1,3 @@
-// Written in 2018 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //!  Script Policies

src/policy/semantic.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! Abstract Policies

src/psbt/mod.rs

@@ -1,4 +1,3 @@
-// Written in 2019 by Andrew Poelstra <[email protected]>
 // SPDX-License-Identifier: CC0-1.0
 
 //! # Partially-Signed Bitcoin Transactions