Remove support for building Alpha/PR (adhoc) builds.

We've haven't really been using these and they're proving to be quite a chore to keep running.
Also, we recently needed an external demo build and we chose to go with custom build on top of testflight instead.

As such it's been decided that we can go ahead and remove them.

Gemfile.lock

@@ -1,9 +1,3 @@
-GIT
-  remote: https://github.com/mhtranbn/fastlane-plugin-diawi.git
-  revision: 6ca982cd41e7c315290240cd4570d5d7b799db38
-  specs:
-    fastlane-plugin-diawi (0.1.3)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -119,8 +113,6 @@ GEM
       xcpretty (~> 0.4.1)
       xcpretty-travis-formatter (>= 0.0.3, < 2.0.0)
     fastlane-plugin-brew (0.1.1)
-    fastlane-plugin-browserstack (0.3.2)
-      rest-client (~> 2.0, >= 2.0.2)
     fastlane-plugin-sentry (1.20.0)
       os (~> 1.1, >= 1.1.4)
     fastlane-plugin-xcconfig (2.1.0)
@@ -166,7 +158,6 @@ GEM
       os (>= 0.9, < 2.0)
       signet (>= 0.16, < 2.a)
     highline (2.0.3)
-    http-accept (1.7.0)
     http-cookie (1.0.8)
       domain_name (~> 0.5)
     httpclient (2.9.0)
@@ -175,9 +166,6 @@ GEM
     json (2.10.2)
     jwt (2.10.1)
       base64
-    mime-types (3.5.2)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2024.0305)
     mini_magick (4.13.2)
     mini_mime (1.1.5)
     multi_json (1.15.0)
@@ -185,7 +173,6 @@ GEM
     mutex_m (0.3.0)
     nanaimo (0.4.0)
     naturally (2.2.1)
-    netrc (0.11.0)
     nkf (0.2.0)
     optparse (0.6.0)
     os (1.1.4)
@@ -197,11 +184,6 @@ GEM
       declarative (< 0.1.0)
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
-    rest-client (2.1.0)
-      http-accept (>= 1.7.0, < 2.0)
-      http-cookie (>= 1.0.2, < 2.0)
-      mime-types (>= 1.16, < 4.0)
-      netrc (~> 0.8)
     retriable (3.1.2)
     rexml (3.4.1)
     rouge (3.28.0)
@@ -246,13 +228,12 @@ GEM
 
 PLATFORMS
   arm64-darwin-22
+  arm64-darwin-24
   x86_64-linux
 
 DEPENDENCIES
   abbrev
   fastlane
-  fastlane-plugin-browserstack
-  fastlane-plugin-diawi!
   fastlane-plugin-sentry
   fastlane-plugin-xcconfig
   fastlane-plugin-xcodegen