Revert "add volume support"

This reverts commit b8bb69f730.

Revert this for now, we will try a simpler non-object volume first

migrations/schema.sql

@@ -233,18 +233,4 @@ CREATE TABLE IF NOT EXISTS appPasswords(
     PRIMARY KEY (id)
 );
 
-CREATE TABLE IF NOT EXISTS volumes(
-    id VARCHAR(128) NOT NULL UNIQUE,
-    name VARCHAR(256) NOT NULL UNIQUE,
-    hostPath VARCHAR(1024) NOT NULL UNIQUE,
-    creationTime TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    PRIMARY KEY (id)
-);
-
-CREATE TABLE IF NOT EXISTS appVolumes(
-    appId VARCHAR(128) NOT NULL,
-    volumeId VARCHAR(128) NOT NULL,
-    FOREIGN KEY(appId) REFERENCES apps(id),
-    FOREIGN KEY(volumeId) REFERENCES volumes(id));
-
 CHARACTER SET utf8 COLLATE utf8_bin;