Remove function Reader.query_query_unverified_contract/4

We don't need to have this function since we have `query_contract/4`
that does the same thing.

apps/explorer/lib/explorer/smart_contract/reader.ex

@@ -77,26 +77,16 @@ defmodule Explorer.SmartContract.Reader do
   end
 
   @doc """
-  Runs contract functions on a given address for an unverified contract with an expected ABI.
+  Runs contract functions on a given address for smart contract with an expected ABI and functions.
+
+  This function can be used to read data from smart contracts that are not verified (like token contracts)
+  since it receives the ABI as an argument.
 
   ## Options
 
   * `:json_rpc_named_arguments` - Options to forward for calling the Ethereum JSON RPC. See
     `t:EthereumJSONRPC.json_rpc_named_arguments.t/0` for full list of options.
   """
-  @spec query_unverified_contract(Hash.Address.t(), [map()], functions(), contract_call_options()) ::
-          functions_results()
-  def query_unverified_contract(
-        %Hash{byte_count: unquote(Hash.Address.byte_count())} = address,
-        abi,
-        functions,
-        opts \\ []
-      ) do
-    contract_address = Hash.to_string(address)
-
-    query_contract(contract_address, abi, functions, opts)
-  end
-
   @spec query_contract(
           String.t(),
           term(),

apps/explorer/test/explorer/smart_contract/reader_test.exs

@@ -115,36 +115,6 @@ defmodule Explorer.SmartContract.ReaderTest do
     end
   end
 
-  test "query_unverified_contract/3" do
-    address = insert(:address)
-
-    abi = [
-      %{
-        "constant" => true,
-        "inputs" => [],
-        "name" => "decimals",
-        "outputs" => [
-          %{
-            "name" => "",
-            "type" => "uint8"
-          }
-        ],
-        "payable" => false,
-        "type" => "function"
-      }
-    ]
-
-    expect(
-      EthereumJSONRPC.Mox,
-      :json_rpc,
-      fn [%{id: id, method: _, params: [%{data: _, to: _}, _]}], _options ->
-        {:ok, [%{id: id, jsonrpc: "2.0", result: "0x0000000000000000000000000000000000000000000000000000000000000012"}]}
-      end
-    )
-
-    assert Reader.query_unverified_contract(address.hash, abi, %{"decimals" => []}) == %{"decimals" => {:ok, [18]}}
-  end
-
   describe "setup_call_payload/2" do
     test "returns the expected payload" do
       function_name = "get"