Remove unnecessary tsconfig arguments (#798)

* style: fix indenting

* build: remove skipLibCheck, paths, and baseUrl from base typescript config

tsconfig.json

 {
-  "extends": "./tsconfig.build.json",
-  "compilerOptions": {
-    "baseUrl": ".",
-    "paths": {
-      "@eth-optimism/*": ["packages/*/src", "integration-tests/*/test"]
-    },
-    "skipLibCheck": true
-  }
+  "extends": "./tsconfig.build.json"
 }