Dead code in ParamLocationResolver after merging #145 and #146

[numbata]

Problem

Neither PR #145 nor #146 leaves this dead code on its own, but merging both does. #145 refactored the old body-detection check into two helpers on ParamLocationResolver:

def self.body_param?(spec)
  body_annotation?(spec) || [Hash, "Hash"].include?(spec[:type])
end

def self.body_annotation?(spec)
  explicit_location(spec) == "body"
end

#146 independently replaced build_flat_params's call site (next if location_resolver.body_param?(spec)) with a direct type check (next if [Hash, "Hash"].include?(spec[:type])). Once both land, body_param? has zero callers in lib/ or test/, and body_annotation? is only called by the now-dead body_param?.

Fix

Delete both methods from lib/grape_oas/api_model_builders/request_params_support/param_location_resolver.rb in a follow-up commit, and confirm no other callers exist via a repo-wide search first.

Why this matters

Left in place, the methods are harmless today but are a trap: someone could later wire body_param? back into a call site without realizing it silently reintroduces the bug #146 fixed (path parameters inheriting param_type: "body" from an outer group getting skipped).

[numbata]

Already resolved. #146 removed the last surviving reference (explicit_non_body_param? was the remaining dead method after that PR's rename), and #149 removed explicit_non_body_param? itself along with its only caller in NestedParamsBuilder#build. git grep confirms zero references to body_param?, body_annotation?, or explicit_non_body_param? on main + #149.