Fix remove_unused_variable rule

[jeparlefrancais]

Closes #182
Closes #186
Closes #187

These changes fixes the remove_unused_variable rule by removing the variables in the right order and fixing the scoping issue with repeat statements.

• add entry to the changelog

[github-actions]

Coverage after merging fix-remove-unused-variable into main will be

86.98%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src/nodes/expressions
type_cast.rs	84.62%	100%	81.82%	85.37%	23–25, 35–37
src/nodes/statements
repeat_statement.rs	100%	100%	100%	100%
src/process
node_processor.rs	97.92%	100%	97.92%	97.92%	43
scope_visitor.rs	86.01%	100%	91.89%	85.16%	109–111, 114, 118, 144–146, 149, 153, 182–184, 198, 202, 255–265, 270, 63–65, 78–80, 83, 87
visitors.rs	99.08%	100%	100%	99%	92–97
src/process/processors
find_usage.rs	100%	100%	100%	100%
src/rules
remove_unused_variable.rs	96.88%	100%	100%	96.53%	138, 161–164, 166–167
src/utils
expressions_as_statement.rs	34.33%	100%	40%	33.87%	24–36, 44, 51–62, 64–73, 75