Remove SpanId from Sampler parameters

[fbogsany]

open-telemetry/opentelemetry-specification#621

opentelemetry-ruby/sdk/lib/opentelemetry/sdk/trace/samplers.rb

Lines 18 to 26 in 0009ea6

	# Custom samplers can be provided by SDK users. The required interface is
	# a callable with the signature:
	#
	# (trace_id:, span_id:, parent_context:, links:, name:, kind:, attributes:) -> Result
	#
	# Where:
	#
	# @param [String] trace_id The trace_id of the {Span} to be created.
	# @param [String] span_id The span_id of the {Span} to be created.

And

opentelemetry-ruby/sdk/lib/opentelemetry/sdk/trace/samplers.rb

Lines 49 to 65 in 0009ea6

	# Returns a {Result} with {Decision::RECORD_AND_SAMPLED}.
	ALWAYS_ON = ->(trace_id:, span_id:, parent_context:, links:, name:, kind:, attributes:) { RECORD_AND_SAMPLED }
	# Returns a {Result} with {Decision::NOT_RECORD}.
	ALWAYS_OFF = ->(trace_id:, span_id:, parent_context:, links:, name:, kind:, attributes:) { NOT_RECORD }
	# Returns a {Result} with {Decision::RECORD_AND_SAMPLED} if the parent
	# context is sampled or {Decision::NOT_RECORD} otherwise, or if there
	# is no parent context.
	# rubocop:disable Style/Lambda
	ALWAYS_PARENT = ->(trace_id:, span_id:, parent_context:, links:, name:, kind:, attributes:) do
	if parent_context&.trace_flags&.sampled?
	RECORD_AND_SAMPLED
	else
	NOT_RECORD
	end
	end

And

opentelemetry-ruby/sdk/lib/opentelemetry/sdk/trace/samplers/probability_sampler.rb

Line 26 in 0009ea6

def call(trace_id:, span_id:, parent_context:, links:, name:, kind:, attributes:)