cleanup:  Remove HAVE_MULTIVOLUME from targets with HAVE_MULTIDRIVE

The latter always enables the former.

There are no remaining HAVE_MULTIVOLUME users in-tree.

Change-Id: I0f4fd03a6ffed5c0eb3fb5f916f671bd199f1c8e
diff --git a/firmware/export/config/creativezen.h b/firmware/export/config/creativezen.h
index 0033b7d..81f594f 100644
--- a/firmware/export/config/creativezen.h
+++ b/firmware/export/config/creativezen.h
@@ -133,7 +133,6 @@
 #define CONFIG_STORAGE STORAGE_SD
 #define NUM_DRIVES 2
 #define HAVE_MULTIDRIVE
-#define HAVE_MULTIVOLUME
 #define HAVE_HOTSWAP
 
 /* todo */
diff --git a/firmware/export/config/creativezenxfi.h b/firmware/export/config/creativezenxfi.h
index 35bd1ef..fbe114d 100644
--- a/firmware/export/config/creativezenxfi.h
+++ b/firmware/export/config/creativezenxfi.h
@@ -138,7 +138,6 @@
 #define CONFIG_STORAGE STORAGE_SD
 #define NUM_DRIVES 2
 #define HAVE_MULTIDRIVE
-#define HAVE_MULTIVOLUME
 #define HAVE_HOTSWAP
 
 /* todo */
diff --git a/firmware/export/config/creativezenxfi2.h b/firmware/export/config/creativezenxfi2.h
index 3945311..9fff106 100644
--- a/firmware/export/config/creativezenxfi2.h
+++ b/firmware/export/config/creativezenxfi2.h
@@ -140,7 +140,6 @@
 #define CONFIG_STORAGE (/*STORAGE_NAND |*/ STORAGE_SD)
 #define NUM_DRIVES 2
 #define HAVE_MULTIDRIVE
-#define HAVE_MULTIVOLUME
 #define HAVE_HOTSWAP_STORAGE_AS_MAIN
 #define HAVE_HOTSWAP
 #define CONFIG_NAND NAND_IMX233
diff --git a/firmware/export/config/creativezenxfi3.h b/firmware/export/config/creativezenxfi3.h
index d72b41d..81e1e45 100644
--- a/firmware/export/config/creativezenxfi3.h
+++ b/firmware/export/config/creativezenxfi3.h
@@ -144,7 +144,6 @@
 #define CONFIG_STORAGE STORAGE_SD
 #define NUM_DRIVES 2
 #define HAVE_MULTIDRIVE
-#define HAVE_MULTIVOLUME
 #define HAVE_HOTSWAP
 
 /* Extra threads: touchpad */