chore: remove unused code in podspec (#2241)

## Description

Since we support RN from 0.71, and `install_modules_dependencies` is
already available there, we can remove the unused code.

RNScreens.podspec

@@ -6,50 +6,6 @@ new_arch_enabled = ENV['RCT_NEW_ARCH_ENABLED'] == '1'
 platform = new_arch_enabled ? "11.0" : "9.0"
 source_files = new_arch_enabled ? 'ios/**/*.{h,m,mm,cpp}' : ["ios/**/*.{h,m,mm}", "cpp/**/*.{cpp,h}"]
 
-folly_compiler_flags = '-DFOLLY_NO_CONFIG -DFOLLY_MOBILE=1 -DFOLLY_USE_LIBCPP=1 -Wno-comma -Wno-shorten-64-to-32'
-
-# Helper class to avoid clashing with Cocoapods install_dependencies function
-class RNScreensDependencyHelper
-  # Helper class to add the Common subspec
-  def self.add_common_subspec(s, new_arch_enabled)
-    unless new_arch_enabled
-      return
-    end
-
-    s.subspec "common" do |ss|
-      ss.source_files         = ["common/cpp/**/*.{cpp,h}", "cpp/**/*.{cpp,h}"]
-      ss.header_dir           = "rnscreens"
-      ss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/common/cpp\"" }
-    end
-  end
-
-  # Function to support older versions of React Native which do not provide the
-  # install_modules_dependencies function
-  def self.install_dependencies(s, new_arch_enabled)
-    if new_arch_enabled
-      s.pod_target_xcconfig = {
-        'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/boost" "$(PODS_ROOT)/boost-for-react-native"  "$(PODS_ROOT)/RCT-Folly"',
-        "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
-      }
-
-      s.compiler_flags  = folly_compiler_flags + ' ' + '-DRCT_NEW_ARCH_ENABLED'
-
-      s.dependency "React"
-      s.dependency "React-RCTFabric"
-      s.dependency "React-Codegen"
-      s.dependency "RCT-Folly"
-      s.dependency "RCTRequired"
-      s.dependency "RCTTypeSafety"
-      s.dependency "ReactCommon/turbomodule/core"
-
-      self.add_common_subspec(s, new_arch_enabled)
-    else
-      s.dependency "React-Core"
-      s.dependency "React-RCTImage"
-    end
-  end
-end
-
 Pod::Spec.new do |s|
   s.name         = "RNScreens"
   s.version      = package["version"]
@@ -66,12 +22,14 @@ Pod::Spec.new do |s|
   s.project_header_files = "cpp/**/*.h" # Don't expose C++ headers publicly to allow importing framework into Swift files
   s.requires_arc = true
 
-  if defined?(install_modules_dependencies()) != nil
-    install_modules_dependencies(s)
-    # Add missing dependencies, that were not included in install_modules_dependencies
-    s.dependency "React-RCTImage"
-    RNScreensDependencyHelper.add_common_subspec(s, new_arch_enabled)
-  else
-    RNScreensDependencyHelper.install_dependencies(s, new_arch_enabled)
+  install_modules_dependencies(s)
+  if new_arch_enabled
+    s.subspec "common" do |ss|
+      ss.source_files         = ["common/cpp/**/*.{cpp,h}", "cpp/**/*.{cpp,h}"]
+      ss.header_dir           = "rnscreens"
+      ss.pod_target_xcconfig  = { "HEADER_SEARCH_PATHS" => "\"$(PODS_TARGET_SRCROOT)/common/cpp\"" }
+    end
   end
+
+  s.dependency "React-RCTImage"
 end