[clang][analyzer] Remove 'alpha.core.CallAndMessageUnInitRefArg' from documentation (NFC). (llvm#81138)

This checker does not exist (any more?) but appeared in the
documentation. No other references to CallAndMessageUnInitRefArg are
found in the full clang code.

Author: balazske

clang/docs/analyzer/checkers.rst

@@ -1890,28 +1890,6 @@ the locking/unlocking of ``mtx_t`` mutexes.
    mtx_lock(&mtx1); // warn: This lock has already been acquired
  }
 
-.. _alpha-core-CallAndMessageUnInitRefArg:
-
-alpha.core.CallAndMessageUnInitRefArg (C,C++, ObjC)
-"""""""""""""""""""""""""""""""""""""""""""""""""""
-Check for logical errors for function calls and Objective-C
-message expressions (e.g., uninitialized arguments, null function pointers, and pointer to undefined variables).
-
-.. code-block:: c
-
- void test(void) {
-   int t;
-   int &p = t;
-   int &s = p;
-   int &q = s;
-   foo(q); // warn
- }
-
- void test(void) {
-   int x;
-   foo(&x); // warn
- }
-
 .. _alpha-core-CastSize:
 
 alpha.core.CastSize (C)

clang/www/analyzer/alpha_checks.html

@@ -87,29 +87,6 @@ <h3 id="core_alpha_checkers">Core Alpha Checkers</h3>
 </pre></div></div></td></tr>
 
 
-<tr><td><a id="alpha.core.CallAndMessageUnInitRefArg"><div class="namedescr expandable"><span class="name">
-alpha.core.CallAndMessageUnInitRefArg</span><span class="lang">
-(C, C++)</span><div class="descr">
-Check for uninitialized arguments in function calls and Objective-C
-message expressions.</div></div></a></td>
-<td><div class="exampleContainer expandable">
-<div class="example"><pre>
-void test(void) {
-  int t;
-  int &p = t;
-  int &s = p;
-  int &q = s;
-  foo(q); // warn
-}
-</pre></div><div class="separator"></div>
-<div class="example"><pre>
-void test(void) {
-  int x;
-  foo(&x); // warn
-}
-</pre></div></div></td></tr>
-
-
 <tr><td><a id="alpha.core.CastSize"><div class="namedescr expandable"><span class="name">
 alpha.core.CastSize</span><span class="lang">
 (C)</span><div class="descr">