[clang][NFC] Remove redundant whitespaces

This breaks the clang check-format on CI.

+ grep -rnI '[[:blank:]]$' clang/lib clang/include clang/docs
clang/lib/Analysis/UnsafeBufferUsage.cpp:2277:#endif

Author: zyn0217

clang/lib/Analysis/UnsafeBufferUsage.cpp

@@ -2274,7 +2274,7 @@ getFixIts(FixableGadgetSets &FixablesForAllVars, const Strategy &S,
           VD, F->getBaseStmt()->getBeginLoc(),
           ("gadget '" + F->getDebugName() + "' refused to produce a fix")
               .str());
-#endif      
+#endif
       FixItsForVariable.erase(VD);
       break;
     }