Delete bigger-than-max.wsdl

resolved #3 (https://github.com/forcedotcom/WSDL2Apex/issues/3). This test case only applied to the online version of the tool which has a limit on the size of the WSDL that can be processed (1 MB). The limit no longer applies to the open source version.
Merge pull request #4 from FishOfPrey/master

Delete test WSDL bigger-than-max.wsdl