Remove last traces of Travis CI support.

.travis.yml

@@ -1,5 +0,0 @@
-os: osx
-osx_image: xcode9.2
-language: objective-c
-script:
-    - Scripts/build.sh -n

Scripts/build.sh

@@ -4,23 +4,7 @@ pushd $(dirname $0)
 BASE=`pwd -P`
 popd
 
-sign=true
-
-while getopts ":hn" option; do
-  case $option in
-    h) echo "usage: $0 [-h] [-n]"; exit ;;
-    n) sign=false ;;
-    ?) echo "error: option -$OPTARG is not implemented"; exit ;;
-  esac
-done
-
-SIGNARGS=""
-
-if [ "$sign" = true ] ; then
-  SIGNARGS=('CODE_SIGN_IDENTITY=""' 'CODE_SIGNING_REQUIRED=NO')
-fi
-
 BUILDPRODUCTS="$BASE"/build/Build/Products/Release
 
-xcodebuild -quiet -workspace "$BASE"/../Cog.xcodeproj/project.xcworkspace -scheme Cog -configuration Release -derivedDataPath "$BASE"/build ${SIGNARGS[*]}
+xcodebuild -quiet -workspace "$BASE"/../Cog.xcodeproj/project.xcworkspace -scheme Cog -configuration Release -derivedDataPath "$BASE"/build