Remove unused method

app/services/holding_requests_adapter.rb

@@ -18,12 +18,6 @@ def doc_id
     @document.fetch('id')
   end
 
-  # Retrieve the host id(s) for the constituent record
-  # @return <Array>
-  def host_id
-    @document.fetch('contained_in_s', [])
-  end
-
   # Access the holding locations from Bib. Data
   # @return [Hash] location hash structure
   delegate :holding_locations, to: :@bib_data_service

spec/services/physical_holdings_markup_builder_spec.rb

@@ -55,7 +55,6 @@
     allow(adapter).to receive(:alma_holding?).and_return(true)
     allow(adapter).to receive(:doc_electronic_access).and_return('http://arks.princeton.edu/ark:/88435/dsp0141687h654': ['DataSpace', 'Citation only'])
     allow(adapter).to receive(:unavailable_holding?).and_return(false)
-    allow(adapter).to receive(:host_id).and_return([])
     allow(adapter).to receive(:sc_location_with_suppressed_button?).with(holding).and_return(false)
   end
 
@@ -203,7 +202,6 @@
       before do
         allow(adapter).to receive(:alma_holding?).and_return(false)
         allow(adapter).to receive(:document).and_return(document)
-        allow(adapter).to receive(:host_id).and_return(["coin-3750"])
         allow(holding).to receive(:dig).and_return("coin-3750")
       end
       # this should be hitting the third condition, but does not seem to be
@@ -268,7 +266,6 @@
 
       before do
         allow(adapter).to receive(:document).and_return(document)
-        allow(adapter).to receive(:host_id).and_return(["SCSB-6593031"])
         allow(holding).to receive(:dig).and_return("SCSB-6593031")
       end
 
@@ -333,7 +330,6 @@
 
       before do
         allow(adapter).to receive(:document).and_return(document)
-        allow(adapter).to receive(:host_id).and_return(["SCSB-10422725"])
         allow(holding).to receive(:dig).and_return("SCSB-10422725")
       end
 
@@ -389,7 +385,6 @@
       end
       before do
         allow(adapter).to receive(:document).and_return(document)
-        allow(adapter).to receive(:host_id).and_return(["99125038613506421"])
         allow(holding).to receive(:dig).and_return("99125038613506421")
       end
       it 'generates the request link for the host record' do