remove solc require which is causing issues with browserify

remix-solidity/src/compiler/compiler.js

@@ -72,12 +72,7 @@ function Compiler (handleImportCall) {
 
   function onInternalCompilerLoaded () {
     if (worker === null) {
-      var compiler
+      var compiler = solc(window.Module)
-      if (typeof (window) === 'undefined') {
-        compiler = require('solc')
-      } else {
-        compiler = solc(window.Module)
-      }
 
       compileJSON = function (source, optimize, cb) {
         var missingInputs = []