Drop Jamfile for building non-legacy libstdc++.so.

* We no longer fake it by converting the static lib into a shared one.

src/libs/stdc++/current/Jamfile

@@ -1,36 +0,0 @@
-SubDir HAIKU_TOP src libs stdc++ current ;
-
-
-rule CreateSharedC++LibraryFromArchive sharedLib : staticLib
-{
-	LINKFLAGS on $(sharedLib) = [ on $(sharedLib) return $(LINKFLAGS) ]
-		-Xlinker --strip-debug -Xlinker --whole-archive ;
-
-	SharedLibraryFromObjects $(sharedLib) : : $(staticLib) ;
-}
-
-
-local architectureObject ;
-for architectureObject in [ MultiArchSubDirSetup ] {
-	on $(architectureObject) {
-		local architecture = $(TARGET_PACKAGING_ARCH) ;
-
-		if $(TARGET_GCC_VERSION_$(architecture)[1]) = 2 {
-			continue ;
-		}
-
-		# create libstdc++.so from the libstdc++.a built with the compiler
-		if $(HAIKU_BUILD_SHARED_LIBSTDC++_$(architecture)) {
-			CreateSharedC++LibraryFromArchive
-				$(HAIKU_SHARED_LIBSTDC++_$(architecture))
-				: $(HAIKU_STATIC_LIBSTDC++_$(architecture)) ;
-		}
-
-		# create libsupc++.so from the libsupc++.a build with the compiler
-		if $(HAIKU_BUILD_SHARED_LIBSUPC++_$(architecture)) {
-			CreateSharedC++LibraryFromArchive
-				$(HAIKU_SHARED_LIBSUPC++_$(architecture))
-				: $(HAIKU_STATIC_LIBSUPC++_$(architecture)) ;
-		}
-	}
-}