[webapi] Remove the support.js in tct-webstorage-w3c-tests

Impacted tests(approved):new 0,update 127,delete 0
Unit test platform:[Tizen IVI][Android]
Unit test result summary:pass 127,fail 0,block 0
Merge pull request #1002 from yunxiaoxie/yunxiaoxie/webstorage

[webapi] Remove the support.js in tct-webstorage-w3c-tests