Remove additional JSVal constructor initializer. apparently this was

used for debugging only, but it causes tools to complain about
duplicate declarations.

Multi-file index.html (rts.js, out.js, lib.js, runmain.js) appears
to run fine with this removed.

lib/boot/shims/src/platform.js.pp

@@ -1,9 +1,6 @@
 
 /* platform-specific setup */
 
-// top-level debug initialization needs this. declare it in case we aren't in the same file as out.js
-function h$ghcjszmprimZCGHCJSziPrimziJSVal_con_e() { return h$stack[h$sp]; };
-
 /*
    if browser mode is active (GHCJS_BROWSER is defined), all the runtime platform
    detection code should be removed by the preprocessor. The h$isPlatform variables