further delete (db queries)

app/policies/exercise_policy.rb

@@ -25,8 +25,7 @@ class ExercisePolicy < AdminOrAuthorPolicy
       if @user.admin?
         @scope.all
       elsif @user.internal_user?
-        #need to remove team query
-        @scope.where('user_id = ? OR public = TRUE OR (team_id IS NOT NULL AND team_id IN (SELECT t.id FROM teams t JOIN internal_users_teams iut ON t.id = iut.team_id WHERE iut.internal_user_id = ?))', @user.id, @user.id)
+        @scope.where('user_id = ? OR public = TRUE', @user.id, @user.id)
       else
         @scope.none
       end

db/schema.rb

@@ -87,7 +87,6 @@ ActiveRecord::Schema.define(version: 20160624130951) do
     t.boolean  "public"
     t.string   "user_type"
     t.string   "token"
-    t.integer  "team_id"
     t.boolean  "hide_file_tree"
     t.boolean  "allow_file_creation"
   end
@@ -173,14 +172,6 @@ ActiveRecord::Schema.define(version: 20160624130951) do
   add_index "internal_users", ["remember_me_token"], name: "index_internal_users_on_remember_me_token", using: :btree
   add_index "internal_users", ["reset_password_token"], name: "index_internal_users_on_reset_password_token", using: :btree
 
-  create_table "internal_users_teams", force: true do |t|
-    t.integer "internal_user_id"
-    t.integer "team_id"
-  end
-
-  add_index "internal_users_teams", ["internal_user_id"], name: "index_internal_users_teams_on_internal_user_id", using: :btree
-  add_index "internal_users_teams", ["team_id"], name: "index_internal_users_teams_on_team_id", using: :btree
-
   create_table "request_for_comments", force: true do |t|
     t.integer  "user_id",      null: false
     t.integer  "exercise_id",  null: false
@@ -203,12 +194,6 @@ ActiveRecord::Schema.define(version: 20160624130951) do
     t.string   "user_type"
   end
 
-  create_table "teams", force: true do |t|
-    t.string   "name"
-    t.datetime "created_at"
-    t.datetime "updated_at"
-  end
-
   create_table "testruns", force: true do |t|
     t.boolean  "passed"
     t.text     "output"