misc: Delete the now unnecessary create methods.

Most create() methods are no longer necessary. This change deletes them,
and occasionally moves some code from them into the constructors they
call.

Change-Id: Icbab29ba280144b892f9b12fac9e29a0839477e5
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/36536
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/storage/disk_image.cc

@@ -159,12 +159,6 @@ RawDiskImage::write(const uint8_t *data, std::streampos offset)
     return stream.tellp() - pos;
 }
 
-RawDiskImage *
-RawDiskImageParams::create() const
-{
-    return new RawDiskImage(*this);
-}
-
 ////////////////////////////////////////////////////////////////////////
 //
 // Copy on Write Disk image
@@ -441,9 +435,3 @@ CowDiskImage::unserialize(CheckpointIn &cp)
     cowFilename = cp.getCptDir() + "/" + cowFilename;
     open(cowFilename);
 }
-
-CowDiskImage *
-CowDiskImageParams::create() const
-{
-    return new CowDiskImage(*this);
-}

src/dev/storage/ide_ctrl.cc

@@ -566,9 +566,3 @@ IdeController::Channel::unserialize(const std::string &base, CheckpointIn &cp)
     paramIn(cp, base + ".selectBit", selectBit);
     select(selectBit);
 }
-
-IdeController *
-IdeControllerParams::create() const
-{
-    return new IdeController(*this);
-}

src/dev/storage/ide_disk.cc

@@ -1197,9 +1197,3 @@ IdeDisk::unserialize(CheckpointIn &cp)
     UNSERIALIZE_ENUM(dmaState);
     UNSERIALIZE_ARRAY(dataBuffer, MAX_DMA_SIZE);
 }
-
-IdeDisk *
-IdeDiskParams::create() const
-{
-    return new IdeDisk(*this);
-}

src/dev/storage/simple_disk.cc

@@ -82,9 +82,3 @@ SimpleDisk::write(Addr addr, baddr_t block, int count)
 {
     panic("unimplemented!\n");
 }
-
-SimpleDisk *
-SimpleDiskParams::create() const
-{
-    return new SimpleDisk(*this);
-}