Softfloat: Stop doing special handling for FREM

This isn't correct and breaks games.
This makes the FREM and REM1 implementation the same.
While not 100% correct, it is still better than before.
New issues will be created to handle the differences in the future.

Fixes #1374.
Also fixes most of the HL2 issues, just not the seam issue.

External/FEXCore/Source/Common/SoftFloat.h

@@ -158,15 +158,7 @@ struct X80SoftFloat {
 
     return Result;
 #else
-    X80SoftFloat Rem = extF80_rem(lhs, rhs);
-    if (SignBit(Rem)) {
-      Rem = extF80_add(Rem, rhs);
-    }
-    else {
-      Rem.Sign = SignBit(lhs);
-    }
-
-    return Rem;
+    return extF80_rem(lhs, rhs);
 #endif
   }