build(e2e, ios): modern build is default, no need to specify it

Author: mikehardy

tests/package.json

@@ -58,15 +58,15 @@
     "configurations": {
       "ios.sim.debug": {
         "binaryPath": "ios/build/Build/Products/Debug-iphonesimulator/testing.app",
-        "build": "xcodebuild VALID_ARCHS=\"`uname -m`\"  CC=clang CPLUSPLUS=clang++ LD=clang LDPLUSPLUS=clang++ -workspace ios/testing.xcworkspace -scheme testing -configuration Debug -sdk iphonesimulator -derivedDataPath ios/build -UseModernBuildSystem=YES",
+        "build": "xcodebuild VALID_ARCHS=\"`uname -m`\"  CC=clang CPLUSPLUS=clang++ LD=clang LDPLUSPLUS=clang++ -workspace ios/testing.xcworkspace -scheme testing -configuration Debug -sdk iphonesimulator -derivedDataPath ios/build",
         "type": "ios.simulator",
         "device": {
           "type": "iPhone 11"
         }
       },
       "ios.sim.release": {
         "binaryPath": "ios/build/Build/Products/Release-iphonesimulator/testing.app",
-        "build": "export RCT_NO_LAUNCH_PACKAGER=true && xcodebuild  CC=clang CPLUSPLUS=clang++ LD=clang LDPLUSPLUS=clang++ -workspace ios/testing.xcworkspace -scheme testing -configuration Release -sdk iphonesimulator -derivedDataPath ios/build -UseModernBuildSystem=YES",
+        "build": "export RCT_NO_LAUNCH_PACKAGER=true && xcodebuild  CC=clang CPLUSPLUS=clang++ LD=clang LDPLUSPLUS=clang++ -workspace ios/testing.xcworkspace -scheme testing -configuration Release -sdk iphonesimulator -derivedDataPath ios/build",
         "type": "ios.simulator",
         "device": {
           "type": "iPhone 11"