diff --git a/.gitignore b/.gitignore
index c21169b36a..3bd906c5e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -113,11 +113,13 @@ unlinked_spec.ds
 **/xcuserdata/
 
 # Windows
+**/windows/flutter/ephemeral/
 **/windows/flutter/generated_plugin_registrant.cc
 **/windows/flutter/generated_plugin_registrant.h
 **/windows/flutter/generated_plugins.cmake
 
 # Linux
+**/linux/flutter/ephemeral/
 **/linux/flutter/generated_plugin_registrant.cc
 **/linux/flutter/generated_plugin_registrant.h
 **/linux/flutter/generated_plugins.cmake
diff --git a/dev/a11y_assessments/.gitignore b/dev/a11y_assessments/.gitignore
deleted file mode 100644
index 24476c5d1e..0000000000
--- a/dev/a11y_assessments/.gitignore
+++ /dev/null
@@ -1,44 +0,0 @@
-# Miscellaneous
-*.class
-*.log
-*.pyc
-*.swp
-.DS_Store
-.atom/
-.buildlog/
-.history
-.svn/
-migrate_working_dir/
-
-# IntelliJ related
-*.iml
-*.ipr
-*.iws
-.idea/
-
-# The .vscode folder contains launch configuration and tasks you configure in
-# VS Code which you may wish to be included in version control, so this line
-# is commented out by default.
-#.vscode/
-
-# Flutter/Dart/Pub related
-**/doc/api/
-**/ios/Flutter/.last_build_id
-.dart_tool/
-.flutter-plugins
-.flutter-plugins-dependencies
-.packages
-.pub-cache/
-.pub/
-/build/
-
-# Symbolication related
-app.*.symbols
-
-# Obfuscation related
-app.*.map.json
-
-# Android Studio will place build artifacts here
-/android/app/debug
-/android/app/profile
-/android/app/release
diff --git a/dev/integration_tests/flavors/.gitignore b/dev/integration_tests/flavors/.gitignore
deleted file mode 100644
index 29a3a5017f..0000000000
--- a/dev/integration_tests/flavors/.gitignore
+++ /dev/null
@@ -1,43 +0,0 @@
-# Miscellaneous
-*.class
-*.log
-*.pyc
-*.swp
-.DS_Store
-.atom/
-.buildlog/
-.history
-.svn/
-migrate_working_dir/
-
-# IntelliJ related
-*.iml
-*.ipr
-*.iws
-.idea/
-
-# The .vscode folder contains launch configuration and tasks you configure in
-# VS Code which you may wish to be included in version control, so this line
-# is commented out by default.
-#.vscode/
-
-# Flutter/Dart/Pub related
-**/doc/api/
-**/ios/Flutter/.last_build_id
-.dart_tool/
-.flutter-plugins
-.flutter-plugins-dependencies
-.pub-cache/
-.pub/
-/build/
-
-# Symbolication related
-app.*.symbols
-
-# Obfuscation related
-app.*.map.json
-
-# Android Studio will place build artifacts here
-/android/app/debug
-/android/app/profile
-/android/app/release
diff --git a/dev/integration_tests/wide_gamut_test/.gitignore b/dev/integration_tests/wide_gamut_test/.gitignore
deleted file mode 100644
index 24476c5d1e..0000000000
--- a/dev/integration_tests/wide_gamut_test/.gitignore
+++ /dev/null
@@ -1,44 +0,0 @@
-# Miscellaneous
-*.class
-*.log
-*.pyc
-*.swp
-.DS_Store
-.atom/
-.buildlog/
-.history
-.svn/
-migrate_working_dir/
-
-# IntelliJ related
-*.iml
-*.ipr
-*.iws
-.idea/
-
-# The .vscode folder contains launch configuration and tasks you configure in
-# VS Code which you may wish to be included in version control, so this line
-# is commented out by default.
-#.vscode/
-
-# Flutter/Dart/Pub related
-**/doc/api/
-**/ios/Flutter/.last_build_id
-.dart_tool/
-.flutter-plugins
-.flutter-plugins-dependencies
-.packages
-.pub-cache/
-.pub/
-/build/
-
-# Symbolication related
-app.*.symbols
-
-# Obfuscation related
-app.*.map.json
-
-# Android Studio will place build artifacts here
-/android/app/debug
-/android/app/profile
-/android/app/release
diff --git a/dev/tools/vitool/.gitignore b/dev/tools/vitool/.gitignore
deleted file mode 100644
index b25141f48a..0000000000
--- a/dev/tools/vitool/.gitignore
+++ /dev/null
@@ -1,8 +0,0 @@
-# Files and directories created by pub
-.dart_tool/
-.packages
-.pub/
-build/
-
-# Directory created by dartdoc
-doc/api/