chore: remove unused path from flow config

.flowconfig

@@ -27,7 +27,6 @@
 .*/example/node_modules/react
 .*/example/node_modules/react-native
 .*/example/node_modules/expo
-.*/example/node_modules/@expo/ex-navigation
 .*/example/\.buckd/
 
 [include]
@@ -36,12 +35,6 @@
 node_modules/react-native/Libraries/react-native/react-native-interface.js
 node_modules/react-native/flow
 
-[include]
-
-[libs]
-node_modules/react-native/Libraries/react-native/react-native-interface.js
-node_modules/react-native/flow
-
 [options]
 emoji=true
 
@@ -52,7 +45,6 @@ experimental.strict_type_args=true
 munge_underscores=true
 
 module.name_mapper='^expo$' -> 'emptyObject'
-module.name_mapper='^@expo/ex-navigation$' -> 'emptyObject'
 module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> 'RelativeImageStub'
 
 suppress_type=$FlowIssue