Revert "[-Wunsafe-buffer-usage] Generate fix-it for local variable declarations"

This reverts commit a29e676.

Author: ziqingluo-90

clang/include/clang/Analysis/Analyses/UnsafeBufferUsage.h

@@ -37,15 +37,6 @@ class UnsafeBufferUsageHandler {
   /// Invoked when a fix is suggested against a variable.
   virtual void handleFixableVariable(const VarDecl *Variable,
                                      FixItList &&List) = 0;
-
-  /// Returns the text indicating that the user needs to provide input there:
-  virtual std::string
-  getUserFillPlaceHolder(StringRef HintTextToUser = "placeholder") {
-    std::string s = std::string("<# ");
-    s += HintTextToUser;
-    s += " #>";
-    return s;
-  }
 };
 
 // This function invokes the analysis and allows the caller to react to it

clang/include/clang/Analysis/Analyses/UnsafeBufferUsageGadgets.def

@@ -30,7 +30,6 @@ WARNING_GADGET(Decrement)
 WARNING_GADGET(ArraySubscript)
 WARNING_GADGET(PointerArithmetic)
 WARNING_GADGET(UnsafeBufferUsageAttr)
-FIXABLE_GADGET(ULCArraySubscript)
 
 #undef FIXABLE_GADGET
 #undef WARNING_GADGET

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -11790,8 +11790,6 @@ def warn_unsafe_buffer_operation : Warning<
   InGroup<UnsafeBufferUsage>, DefaultIgnore;
 def note_unsafe_buffer_operation : Note<
   "used%select{| in pointer arithmetic| in buffer access}0 here">;
-def note_unsafe_buffer_variable_fixit : Note<
-  "change type of '%0' to '%select{std::span|std::array|std::span::iterator}1' to preserve bounds information">;
 def err_loongarch_builtin_requires_la32 : Error<
   "this builtin requires target: loongarch32">;
 } // end of sema component.