udeb: Remove several redundant or ineffective exclusions

- Could-be-modules that are actually built-in are automatically skipped
  by kernel-wedge without error (since v2.84)
- Modules that are *optionally* included by other configuration files
  don't need to be explicitly excluded for flavours that don't build them
- Modules that are included as dependencies cannot be excluded

debian/installer/alpha/modules/alpha-generic/ata-modules

@@ -1,2 +1 @@
 #include <ata-modules>
-libata -

debian/installer/alpha/modules/alpha-generic/nic-modules

@@ -1,2 +1 @@
 #include <nic-modules>
-vmxnet3 -

debian/installer/arm64/modules/arm64/usb-storage-modules

@@ -1,2 +1 @@
 #include <usb-storage-modules>
-usb-storage -

debian/installer/armhf/modules/armhf-armmp/usb-storage-modules

@@ -1,2 +1 @@
 #include <usb-storage-modules>
-usb-storage -

debian/installer/hppa/modules/hppa/ata-modules

@@ -1,2 +1 @@
 #include <ata-modules>
-libata -

debian/installer/powerpc/modules/powerpc/ata-modules

@@ -1,2 +1 @@
 #include <ata-modules>
-libata -

debian/installer/powerpc/modules/powerpc/scsi-core-modules

@@ -1,2 +1 @@
 #include <scsi-core-modules>
-scsi_mod -