[mlir][bufferization] Remove buffer-deallocation pass (#126366)

The `-buffer-deallocation` pass is not compatible with One-Shot
Bufferize and has been replaced with the Ownership-based Buffer
Deallocation pass about 1.5 years ago. To clean up the code base, this
commit removes the deprecated `buffer-deallocation` pass. All uses of
this deprecated pass within MLIR have already been migrated.

Note for LLVM integration: If you depend on this pass, migrate to the
Ownership-based Buffer Deallocation pass or copy the pass to your
codebase. For details, see
https://discourse.llvm.org/t/psa-bufferization-new-buffer-deallocation-pipeline/73375.

Author: matthias-springer

mlir/docs/BufferDeallocationInternals.md

@@ -5,9 +5,7 @@
 One-Shot Bufferize does not deallocate any buffers that it allocates. After
 running One-Shot Bufferize, the resulting IR may have a number of `memref.alloc`
 ops, but no `memref.dealloc` ops. Buffer dellocation is delegated to the
-`-ownership-based-buffer-deallocation` pass. This pass supersedes the now
-deprecated `-buffer-deallocation` pass, which does not work well with
-One-Shot Bufferize.
+`-ownership-based-buffer-deallocation` pass.
 
 On a high level, buffers are "owned" by a basic block. Ownership materializes
 as an `i1` SSA value and can be thought of as "responsibility to deallocate". It