Remove the assertion as it was useless and broken.

Enforcing the assert caused the following tests to fail:
Clang :: Analysis__bstring.c
Clang :: Analysis__comparison-implicit-casts.cpp
Clang :: Analysis__malloc-interprocedural.c
Clang :: Analysis__malloc.c
Clang :: Analysis__redefined_system.c
Clang :: Analysis__string.c
Clang :: Analysis__weak-functions.c

llvm-svn: 235190

clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp

@@ -1922,10 +1922,6 @@ bool CStringChecker::evalCall(const CallExpr *CE, CheckerContext &C) const {
   if (!evalFunction)
     return false;
 
-  // Make sure each function sets its own description.
-  // (But don't bother in a release build.)
-  assert(!(CurrentFunctionDescription == nullptr));
-
   // Check and evaluate the call.
   (this->*evalFunction)(C, CE);