Fix TsLint defaults (sds#594)

Removes flags from TsLint default config, which appeared to break linting. 
The "prose" option for `-t` is also default, so shouldn't be necessary to specify as a flag?

Author: chiubaka

config/default.yml

@@ -727,7 +727,6 @@ PreCommit:
       description: 'Analyze with TSLint'
       required_executable: 'tslint'
       install_command: 'npm install -g tslint typescript'
-      flags: ['--t=prose']
       include: '**/*.ts'
 
   TrailingWhitespace: