chore(ai): remove old gemini-resume and save_gemini_session files

Completes the rename started in the previous commit; these files were
superseded by antigravity-resume and save_antigravity_session.

functions/gemini-resume.fish

@@ -1,23 +0,0 @@
-# Copyright (C) 2026 Rootiest
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-# Execute gemini-resume
-function gemini-resume --description 'Execute gemini-resume'
-    if not type -q gemini-cli
-        echo "Error: The 'gemini-cli' command is not installed or not in PATH." >&2
-        return 1
-    end
-    if not type -q save_gemini_session
-        echo "Error: The companion function 'save_gemini_session' is missing." >&2
-        return 1
-    end
-
-    if test -f .gemini_session
-        set -l sid (cat .gemini_session)
-        # Use --resume (or -r) to jump back in
-        gemini --resume $sid
-    else
-        # Fallback to the interactive session browser
-        gemini --resume
-    end
-end

functions/save_gemini_session.fish

@@ -1,32 +0,0 @@
-#!/usr/bin/env fish
-
-# Copyright (C) 2026 Rootiest
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-# 1. Read the JSON from stdin
-set -l input (cat)
-
-# 2. Extract session_id using Python
-set -l sid (echo $input | python3 -c "import sys,json; print(json.load(sys.stdin).get('session_id', ''))")
-set -l session_file ".gemini_session"
-
-if test -n "$sid"
-    # 3. Save the session ID locally
-    echo "$sid" >$session_file
-
-    # 4. Smart .gitignore check
-    # We only attempt this if we are inside a Git repository
-    if git rev-parse --is-inside-work-tree >/dev/null 2>&1
-        # If 'git check-ignore' fails, it means the file is NOT currently ignored
-        if not git check-ignore -q $session_file
-            # Append a labeled entry to .gitignore
-            echo -e "\n# AI Session IDs\n$session_file" >>.gitignore
-        end
-    end
-
-    # 5. Update universal variable for cross-terminal access
-    set -U LAST_GEMINI_SESSION "$sid"
-end
-
-# MANDATORY: Every hook must output valid JSON or an empty object
-echo '{}'