Remove coveralls

Gemfile

@@ -43,7 +43,6 @@ gem 'active_model_serializers'
 gem 'mailgun-ruby'
 
 group :test, optional: true do
-  gem 'coveralls', require: false
   gem 'factory_bot_rails'
   gem 'faker'
   gem 'rspec-rails'

Gemfile.lock

@@ -91,12 +91,6 @@ GEM
     case_transform (0.2)
       activesupport
     concurrent-ruby (1.2.3)
-    coveralls (0.8.23)
-      json (>= 1.8, < 3)
-      simplecov (~> 0.16.1)
-      term-ansicolor (~> 1.3)
-      thor (>= 0.19.4, < 2.0)
-      tins (~> 1.6)
     crass (1.0.6)
     date (3.3.4)
     devise (4.9.3)
@@ -106,7 +100,6 @@ GEM
       responders
       warden (~> 1.2.3)
     diff-lcs (1.5.1)
-    docile (1.4.0)
     domain_name (0.6.20240107)
     e2mmap (0.1.0)
     erubi (1.12.0)
@@ -277,11 +270,6 @@ GEM
     ruby-progressbar (1.13.0)
     shoulda-matchers (6.2.0)
       activesupport (>= 5.2.0)
-    simplecov (0.16.1)
-      docile (~> 1.1)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
     solargraph (0.50.0)
       backport (~> 1.2)
       benchmark
@@ -305,14 +293,9 @@ GEM
     sqlite3 (1.7.3-aarch64-linux)
     sqlite3 (1.7.3-arm64-darwin)
     sqlite3 (1.7.3-x86_64-linux)
-    sync (0.5.0)
-    term-ansicolor (1.7.2)
-      tins (~> 1.0)
     thor (1.3.1)
     tilt (2.3.0)
     timeout (0.4.1)
-    tins (1.32.1)
-      sync
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.5.0)
@@ -334,7 +317,6 @@ PLATFORMS
 DEPENDENCIES
   active_model_serializers
   bootsnap
-  coveralls
   devise
   devise_token_auth!
   factory_bot_rails