Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)

Apparently, the style needs to be agreed upon first.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240390 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/APInt.cpp

@@ -2331,7 +2331,7 @@ namespace {
   {
     return findFirstSet(value, ZB_Max);
   }
-} // namespace
+}
 
 /* Sets the least significant part of a bignum to the input value, and
    zeroes out higher parts.  */