Fix rubocop offenses

We still need Style/OptionalBooleanParameter as Ruby 2.7.5
gets confused with,
```
def serialized_attributes(str = +'', additional_attributes = {}, camelize_value: true)
```

2 files changed, 3 insertions, 9 deletions

diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 2385ecb2..dde13026 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -79,7 +79,6 @@ Lint/UnusedBlockArgument:
 Lint/UnusedMethodArgument:
   Exclude:
     - 'lib/axlsx/package.rb'
-    - 'lib/axlsx/util/serialized_attributes.rb'
     - 'lib/axlsx/util/validators.rb'
 
 Lint/UselessAssignment:
@@ -95,11 +94,6 @@ Lint/Void:
     - 'lib/axlsx/workbook/worksheet/data_bar.rb'
     - 'lib/axlsx/workbook/worksheet/pivot_table.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Performance/BlockGivenWithExplicitBlock:
-  Exclude:
-    - 'lib/axlsx/util/serialized_attributes.rb'
-
 # Configuration parameters: MinSize.
 Performance/CollectionLiteralInLoop:
   Exclude:
@@ -369,7 +363,6 @@ Style/Next:
 Style/NonNilCheck:
   Exclude:
     - 'lib/axlsx/drawing/d_lbls.rb'
-    - 'lib/axlsx/util/serialized_attributes.rb'
     - 'lib/axlsx/workbook/worksheet/col.rb'
     - 'lib/axlsx/workbook/worksheet/page_setup.rb'
 
@@ -398,6 +391,7 @@ Style/OptionalBooleanParameter:
   Exclude:
     - 'lib/axlsx.rb'
     - 'lib/axlsx/package.rb'
+    - 'lib/axlsx/util/serialized_attributes.rb'
     - 'lib/axlsx/util/validators.rb'
     - 'lib/axlsx/workbook/workbook.rb'
     - 'lib/axlsx/workbook/worksheet/cell.rb'
diff --git a/lib/axlsx/util/serialized_attributes.rb b/lib/axlsx/util/serialized_attributes.rb
index b2b63fe1..27e19904 100644
--- a/lib/axlsx/util/serialized_attributes.rb
+++ b/lib/axlsx/util/serialized_attributes.rb
@@ -41,7 +41,7 @@ module Axlsx
 
     # creates a XML tag with serialized attributes
     # @see SerializedAttributes#serialized_attributes
-    def serialized_tag(tagname, str, additional_attributes = {}, &block)
+    def serialized_tag(tagname, str, additional_attributes = {})
       str << '<' << tagname << ' '
       serialized_attributes(str, additional_attributes)
       if block_given?
@@ -96,7 +96,7 @@ module Axlsx
     # @param [String] str The string instance to which serialized data is appended
     # @param [Array] additional_attributes An array of additional attribute names.
     # @return [String] The serialized output.
-    def serialized_element_attributes(str = +'', additional_attributes = [], &block)
+    def serialized_element_attributes(str = +'', additional_attributes = [])
       attrs = self.class.xml_element_attributes + additional_attributes
       values = Axlsx.instance_values_for(self)
       attrs.each do |attribute_name|