Remove CSV view context and helpers (#804)

Closes #803

lib/phlex/csv.rb

@@ -9,13 +9,12 @@ def initialize(collection)
 		@_headers = []
 		@_current_row = []
 		@_current_column_index = 0
-		@_view_context = nil
 		@_first = true
 	end
 
 	attr_reader :collection
 
-	def call(buffer = +"", view_context: nil)
+	def call(buffer = +"", context: nil)
 		unless escape_csv_injection? == true || escape_csv_injection? == false
 			raise <<~MESSAGE
 				You need to define escape_csv_injection? in #{self.class.name}, returning either `true` or `false`.
@@ -40,8 +39,6 @@ def escape_csv_injection? = true
 			MESSAGE
 		end
 
-		@_view_context = view_context
-
 		each_item do |record|
 			yielder(record) do |*args, **kwargs|
 				view_template(*args, **kwargs)
@@ -105,10 +102,6 @@ def escape_csv_injection?
 		nil
 	end
 
-	def helpers
-		@_view_context
-	end
-
 	def __escape__(value)
 		value = trim_whitespace? ? value.to_s.strip : value.to_s
 		first_char = value[0]