Fix Lint/Void offenses

Setter methods return the assigned value. Given:

```rb
class MyClass
  def foo=(v)
    v = 10
    42
  end
end
```

`my_object.foo = 5` will always return `5`

This methods removes code that does not have effect

5 files changed, 0 insertions, 14 deletions

diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 19c4b3f5..3fc85dec 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -82,14 +82,6 @@ Lint/UselessAssignment:
     - 'lib/axlsx/workbook/worksheet/header_footer.rb'
     - 'lib/axlsx/workbook/worksheet/sheet_protection.rb'
 
-# Configuration parameters: CheckForMethodsWithNoSideEffects.
-Lint/Void:
-  Exclude:
-    - 'lib/axlsx/drawing/title.rb'
-    - 'lib/axlsx/util/storage.rb'
-    - 'lib/axlsx/workbook/worksheet/data_bar.rb'
-    - 'lib/axlsx/workbook/worksheet/pivot_table.rb'
-
 # Configuration parameters: MinSize.
 Performance/CollectionLiteralInLoop:
   Exclude:
diff --git a/lib/axlsx/drawing/title.rb b/lib/axlsx/drawing/title.rb
index c3ca9632..2e4037fb 100644
--- a/lib/axlsx/drawing/title.rb
+++ b/lib/axlsx/drawing/title.rb
@@ -32,7 +32,6 @@ module Axlsx
       DataTypeValidator.validate 'Title.text', String, v
       @text = v
       @cell = nil
-      v
     end
 
     # @see text_size
@@ -40,7 +39,6 @@ module Axlsx
       DataTypeValidator.validate 'Title.text_size', String, v
       @text_size = v
       @cell = nil
-      v
     end
 
     # @see cell
@@ -48,7 +46,6 @@ module Axlsx
       DataTypeValidator.validate 'Title.text', Cell, v
       @cell = v
       @text = v.value.to_s
-      v
     end
 
     # Check if the title is empty.
diff --git a/lib/axlsx/util/storage.rb b/lib/axlsx/util/storage.rb
index 2ce0d8f5..1e12b2d4 100644
--- a/lib/axlsx/util/storage.rb
+++ b/lib/axlsx/util/storage.rb
@@ -63,7 +63,6 @@ module Axlsx
     def name=(v)
       @name = v.bytes.to_a << 0
       @name_size = @name.size * 2
-      @name
     end
 
     # The size of the stream
diff --git a/lib/axlsx/workbook/worksheet/data_bar.rb b/lib/axlsx/workbook/worksheet/data_bar.rb
index 108a5c16..482bd029 100644
--- a/lib/axlsx/workbook/worksheet/data_bar.rb
+++ b/lib/axlsx/workbook/worksheet/data_bar.rb
@@ -101,7 +101,6 @@ module Axlsx
     def color=(v)
       @color = v if v.is_a? Color
       self.color.rgb = v if v.is_a? String
-      @color
     end
 
     # Serialize this object to an xml string
diff --git a/lib/axlsx/workbook/worksheet/pivot_table.rb b/lib/axlsx/workbook/worksheet/pivot_table.rb
index 27065e4b..44a50f19 100644
--- a/lib/axlsx/workbook/worksheet/pivot_table.rb
+++ b/lib/axlsx/workbook/worksheet/pivot_table.rb
@@ -135,7 +135,6 @@ module Axlsx
         end
         @data << data_field
       end
-      @data
     end
 
     # The pages