[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
Thank you very much for this improvement.

Actually, it is unnecessary for the end tag `<link />` as you did `<meta>` above.