Revert "Deprecate functions not supported in SymPyCore (#531)" (#532)

This reverts commit a2476de.

Author: jverzani

Project.toml

@@ -1,6 +1,6 @@
 name = "SymPy"
 uuid = "24249f21-da20-56a4-8eb1-6a02cf4ae2e6"
-version = "1.2.0"
+version = "1.1.14"
 
 [deps]
 CommonEq = "3709ef60-1bee-4518-9f2f-acd86f176c50"

src/SymPy.jl

@@ -81,7 +81,6 @@ include("permutations.jl")
 include("plot_recipes.jl")
 include("latexify_recipe.jl")
 
-include("deprecated.jl")
 ##################################################
 
 pynull() = PyCall.PyNULL()

src/constructors.jl

@@ -30,7 +30,7 @@ Examples:
 @vars a b real=true
 ```
 !!! Note:
-    The `@vars` macro is deprecated and will be removed. Use `@syms`.
+    The `@syms` macro is recommended as it has a more flexible syntax
 """
 macro vars(x...)
     q = Expr(:block)