Remove MSVC version-specific symbol export for 32-Windows

The MSVC version-specific symbol export for 32-Windows seems to break
the `rf614_binned_fit_problems.C` tutorial when using the CXX compiler
MSVC 19.39.33521.0:
```txt
1564/2950 Test  #975: tutorial-roofit-roofit-rf614_binned_fit_problems ..................................................***Failed   15.32 sec

Processing C:/ROOT-CI/src/tutorials/roofit/roofit/rf614_binned_fit_problems.C...
IncrementalExecutor::executeFunction: symbol '__std_find_trivial_4@12' unresolved while linking [cling interface function]!
You are probably missing the definition of __std_find_trivial_4@12
Maybe you need to load the corresponding shared library?
CMake Error at C:/ROOT-CI/build/RootTestDriver.cmake:232 (message):
  error code: 1
```

Follows up on:

  * #15063
  * #15860

Author: guitargeek

core/metacling/src/CMakeLists.txt

@@ -190,21 +190,6 @@ if(MSVC)
       ??1LifetimeHandler@internal@runtime@cling@@QAE@XZ
       ?_Facet_Register@std@@YAXPAV_Facet_base@1@@Z
     )
-    if(MSVC_VERSION GREATER_EQUAL 1938 AND MSVC_VERSION LESS 1940)
-      set(cling_exports ${cling_exports}
-        ??$__std_find_trivial@$$CBDD@@YAPBDPBD0D@Z
-        ??$__std_find_trivial@DD@@YAPADPAD0D@Z
-        ??$__std_find_trivial@HH@@YAPAHPAH0H@Z
-        ??$__std_find_trivial@IH@@YAPAIPAI0H@Z
-        ___std_find_trivial_1@12
-        ___std_find_trivial_2@12
-        ___std_find_trivial_4@12
-        ___std_find_trivial_8@16
-      )
-    endif()
-    if(MSVC_VERSION LESS 1914)
-      set(cling_exports ${cling_exports} ??3@YAXPAX0@Z ??_V@YAXPAX0@Z)
-    endif()
   endif()
   foreach(sym ${cling_exports})
     set(cling_link_str "${cling_link_str} /EXPORT:${sym}")