remove button for creating terminal in project view (#1199)

For environments that are not "activatable" the terminal button is
removed from the list (since it doesn't make sense) in the environment
manager view. This is not possible with the project manager view since
the terminal button is attached to the project instead of the
environment. It also is a duplicate button so doesn't really add much.
Remove for these reasons


fixes
#1035

Author: eleanorjboyd

package.json

@@ -533,11 +533,6 @@
                     "group": "inline",
                     "when": "view == python-projects && viewItem =~ /.*python-workspace.*/"
                 },
-                {
-                    "command": "python-envs.createTerminal",
-                    "group": "inline",
-                    "when": "view == python-projects && viewItem =~ /.*python-workspace.*/"
-                },
                 {
                     "command": "python-envs.copyProjectPath",
                     "group": "inline",