[clang] [clang-tools-extra] [analyzer] Remove alpha.core.IdenticalExpr Checker (PR #114715)

[Julian Schmidt via cfe-commits]

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@@ -32,9 +32,28 @@ If this is the intended behavior, then there is no reason to use a conditional
 statement; otherwise the issue can be solved by fixing the branch that is
 handled incorrectly.
 
-The check also detects repeated branches in longer ``if/else if/else`` chains
+The check detects repeated branches in longer ``if/else if/else`` chains
 where it would be even harder to notice the problem.
 
+The check also detects repeated inner and outer if statements that may
+be a result of a copy-paste error. This check cannot currently detect
+identical inner and outer if statements if code is between the if
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5chmidti wrote:

```
``if`` statements
```

https://github.com/llvm/llvm-project/pull/114715