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

Impacted tests(approved):new 0,update 50,delete 0
Unit test platform:[Tizen IVI][Android]
Unit test result summary:pass 44,fail 6,block 0

Fail reason: not support these attributes -- CONSTRAINT_ERR, DATABASE_ERR, QUOTA_ERR, TOO_LARGE_ERR, UNKNOWN_ERR, VERSION_ERR
Note: some tests need support.js file to invoke common method, so keep it.