Find{TCL,Tclsh,TclStub}: Remove matches for non-existent Tcl/Tk 8.7

Version 8.7 of Tcl/Tk never made it past alpha status.
What was briefly labeled 8.7a5 eventually released as 9.0.0.

And in FindTclStub, also remove patterns for ttkstub8.8, which
even more than 8.7 never actually existed.

Modules/FindTCL.cmake

@@ -116,8 +116,6 @@ set(TCLTK_POSSIBLE_LIB_PATHS
 )
 
 set(TCLTK_POSSIBLE_LIB_PATH_SUFFIXES
-  lib/tcl/tcl8.7
-  lib/tcl/tk8.7
   lib/tcl/tcl8.6
   lib/tcl/tk8.6
   lib/tcl/tcl8.5
@@ -143,7 +141,6 @@ find_library(TCL_LIBRARY
   NAMES
   tcl
   tcl${TCL_LIBRARY_VERSION} tcl${TCL_TCLSH_VERSION} tcl${TK_WISH_VERSION}
-  tcl87 tcl8.7 tcl87t tcl8.7t
   tcl86 tcl8.6 tcl86t tcl8.6t
   tcl85 tcl8.5
   tcl84 tcl8.4
@@ -158,7 +155,6 @@ find_library(TK_LIBRARY
   NAMES
   tk
   tk${TK_LIBRARY_VERSION} tk${TCL_TCLSH_VERSION} tk${TK_WISH_VERSION}
-  tk87 tk8.7 tk87t tk8.7t
   tk86 tk8.6 tk86t tk8.6t
   tk85 tk8.5
   tk84 tk8.4
@@ -205,8 +201,6 @@ set(TCLTK_POSSIBLE_INCLUDE_PATHS
 set(TCLTK_POSSIBLE_INCLUDE_PATH_SUFFIXES
   include/tcl${TK_LIBRARY_VERSION}
   include/tcl${TCL_LIBRARY_VERSION}
-  include/tcl8.7
-  include/tk8.7
   include/tcl8.6
   include/tk8.6
   include/tcl8.5

Modules/FindTclStub.cmake

@@ -119,7 +119,6 @@ find_library(TCL_STUB_LIBRARY
   NAMES
   tclstub
   tclstub${TK_LIBRARY_VERSION} tclstub${TCL_TCLSH_VERSION} tclstub${TK_WISH_VERSION}
-  tclstub87 tclstub8.7
   tclstub86 tclstub8.6
   tclstub85 tclstub8.5
   tclstub84 tclstub8.4
@@ -133,7 +132,6 @@ find_library(TK_STUB_LIBRARY
   NAMES
   tkstub
   tkstub${TCL_LIBRARY_VERSION} tkstub${TCL_TCLSH_VERSION} tkstub${TK_WISH_VERSION}
-  tkstub87 tkstub8.7
   tkstub86 tkstub8.6
   tkstub85 tkstub8.5
   tkstub84 tkstub8.4
@@ -147,8 +145,6 @@ find_library(TTK_STUB_LIBRARY
   NAMES
   ttkstub
   ttkstub${TCL_LIBRARY_VERSION} ttkstub${TCL_TCLSH_VERSION} ttkstub${TK_WISH_VERSION}
-  ttkstub88 ttkstub8.8
-  ttkstub87 ttkstub8.7
   ttkstub86 ttkstub8.6
   ttkstub85 ttkstub8.5
   PATHS ${TCLTK_POSSIBLE_LIB_PATHS}

Modules/FindTclsh.cmake

@@ -114,7 +114,6 @@ endif()
 set(TCL_TCLSH_NAMES
   tclsh
   tclsh${TCL_LIBRARY_VERSION} tclsh${TK_LIBRARY_VERSION} tclsh${TK_WISH_VERSION}
-  tclsh87 tclsh8.7
   tclsh86 tclsh8.6
   tclsh85 tclsh8.5
   tclsh84 tclsh8.4