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/cpu/timing_expr.cc

@@ -197,51 +197,3 @@ uint64_t TimingExprIf::eval(TimingExprEvalContext &context)
     else
         return falseExpr->eval(context);
 }
-
-TimingExprLiteral *
-TimingExprLiteralParams::create() const
-{
-    return new TimingExprLiteral(*this);
-}
-
-TimingExprSrcReg *
-TimingExprSrcRegParams::create() const
-{
-    return new TimingExprSrcReg(*this);
-}
-
-TimingExprReadIntReg *
-TimingExprReadIntRegParams::create() const
-{
-    return new TimingExprReadIntReg(*this);
-}
-
-TimingExprLet *
-TimingExprLetParams::create() const
-{
-    return new TimingExprLet(*this);
-}
-
-TimingExprRef *
-TimingExprRefParams::create() const
-{
-    return new TimingExprRef(*this);
-}
-
-TimingExprUn *
-TimingExprUnParams::create() const
-{
-    return new TimingExprUn(*this);
-}
-
-TimingExprBin *
-TimingExprBinParams::create() const
-{
-    return new TimingExprBin(*this);
-}
-
-TimingExprIf *
-TimingExprIfParams::create() const
-{
-    return new TimingExprIf(*this);
-}