Remove deprecated coveralls config option

Xerkus · Xerkus · commit 02bb986dde6b · 2017-10-12T00:59:23.000+10:00
diff --git a/.coveralls.yml b/.coveralls.yml
@@ -1,3 +1,2 @@
 coverage_clover: clover.xml
 json_path: coveralls-upload.json
-src_dir: src

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,2 @@`
`1`	`1`	`coverage_clover: clover.xml`
`2`	`2`	`json_path: coveralls-upload.json`
`3`		`-src_dir: src`