[ios] Remove support for 32-bit simulators (i386)

And restore some docs that got lost in a merge.

platform/ios/CHANGELOG.md

@@ -4,6 +4,10 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 
 ## master
 
+### Packaging
+
+* Removed support for 32-bit simulators. ([#10962](https://github.com/mapbox/mapbox-gl-native/pull/10962))
+
 ### Styles and rendering
 
 * Added `MGLComputedShapeSource` source class that allows applications to supply vector data on a per-tile basis.

platform/ios/INSTALL.md

@@ -10,9 +10,11 @@ The Mapbox Maps SDK for iOS is intended to run on iOS 8.0 and above on the follo
 * iPad 2 and above (3, 4, Mini, Air, Mini 2, Air 2, Pro)
 * iPod touch 5th generation and above
 
-Note that debugging in 32-bit simulators (such as the iPhone 5 or iPad 2) is only partially supported. Support for these simulators will be removed entirely in a future release of this SDK.
+Note that 32-bit simulators (such as the iPhone 5 or iPad 2) are not supported.
 
-The Mapbox Maps SDK for iOS requires Xcode 8.0 or higher. To use this SDK with Xcode 7.3.1, download and use a symbols build from the [releases](https://github.com/mapbox/mapbox-gl-native/releases) page.
+The Mapbox Maps SDK for iOS requires:
+
+* Xcode 9.1 or higher to compile from source
 * Xcode 8.0 or higher to integrate the compiled framework into an application
 
 ### Building the SDK

platform/ios/scripts/package.sh

@@ -70,7 +70,7 @@ xcodebuild \
     CURRENT_SHORT_VERSION=${SHORT_VERSION} \
     CURRENT_SEMANTIC_VERSION=${SEM_VERSION} \
     CURRENT_COMMIT_HASH=${HASH} \
-    ONLY_ACTIVE_ARCH=NO \
+    ARCHS="x86_64" \
     -derivedDataPath ${DERIVED_DATA} \
     -workspace ./platform/ios/ios.xcworkspace \
     -scheme ${SCHEME} \
@@ -194,11 +194,6 @@ if [[ ${BUILD_DYNAMIC} == true && ${BUILDTYPE} == Release ]]; then
     validate_dsym \
         "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}" \
         "${OUTPUT}/dynamic/${NAME}.framework/${NAME}"
-
-        # To-do: remove this in 4.0.0, as we intend to remove support for i386 entirely.
-        step "Removing i386 slice from dSYM"
-        lipo -remove i386 "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}" -o "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}"
-        lipo -info "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}"
 fi
 
 function create_podspec {