Remove unnecessary pretty_printer package from lab GPR files

Author: frank-at-adacore

courses/ada_essentials/130_program_structure/lab/program_structure/prompt/default.gpr

@@ -1,8 +1,5 @@
 project Default is
    for Main use ("main.adb");
-   package Pretty_Printer is
-     for Default_Switches ("ada") use ("-nM", "-A0", "-A2", "-A3", "-A4", "--no-separate-is", "--no-separate-loop-then", "--use-on-new-line", "-A1", "--par-threshold=1", "--call-threshold=1");
-   end Pretty_Printer;
    package Compiler is
      for Switches ("ada") use ("-gnata","-gnatwa" );
    end Compiler;

courses/ada_essentials/175_multiple_inheritance/lab/multiple_inheritance/prompt/default.gpr

@@ -1,8 +1,5 @@
 project Default is
    for Main use ("main.adb");
-   package Pretty_Printer is
-     for Default_Switches ("ada") use ("-nM", "-A0", "-A2", "-A3", "-A4", "--no-separate-is", "--no-separate-loop-then", "--use-on-new-line", "-A1", "--par-threshold=1", "--call-threshold=1");
-   end Pretty_Printer;
    package Compiler is
      for Switches ("ada") use ("-gnata","-gnatwa" );
    end Compiler;

courses/ada_essentials/230_interfacing_with_c/lab/interfacing_with_c/prompt/default.gpr

@@ -2,10 +2,6 @@ project Default is
 
    for Main use ("main.adb");
 
-   package Pretty_Printer is
-      for Default_Switches ("ada") use ("-nM", "-A0", "-A2", "-A3", "-A4", "--no-separate-is", "--no-separate-loop-then", "--use-on-new-line", "-A1", "--par-threshold=1", "--call-threshold=1");
-   end Pretty_Printer;
-
    package Compiler is
       for Switches ("ada") use ("-gnatwe", "-gnata");
    end Compiler;

courses/ada_essentials/273_subprogram_contracts/lab/subprogram_contracts/prompt/default.gpr

@@ -1,8 +1,5 @@
 project Default is
    for Main use ("main.adb");
-   package Pretty_Printer is
-     for Default_Switches ("ada") use ("-nM", "-A0", "-A2", "-A3", "-A4", "--no-separate-is", "--no-separate-loop-then", "--use-on-new-line", "-A1", "--par-threshold=1", "--call-threshold=1");
-   end Pretty_Printer;
    package Compiler is
      for Switches ("ada") use ("-gnata","-gnatwa" );
    end Compiler;

courses/ada_essentials/276_type_contracts/lab/type_contracts/prompt/default.gpr

@@ -1,8 +1,5 @@
 project Default is
    for Main use ("main.adb");
-   package Pretty_Printer is
-     for Default_Switches ("ada") use ("-nM", "-A0", "-A2", "-A3", "-A4", "--no-separate-is", "--no-separate-loop-then", "--use-on-new-line", "-A1", "--par-threshold=1", "--call-threshold=1");
-   end Pretty_Printer;
    package Compiler is
      for Switches ("ada") use ("-gnata","-gnatwa" );
    end Compiler;

courses/ada_essentials/894_ada_containers/lab/ada_containers/prompt/default.gpr

@@ -1,8 +1,5 @@
 project Default is
    for Main use ("main.adb");
-   package Pretty_Printer is
-     for Default_Switches ("ada") use ("-nM", "-A0", "-A2", "-A3", "-A4", "--no-separate-is", "--no-separate-loop-then", "--use-on-new-line", "-A1", "--par-threshold=1", "--call-threshold=1");
-   end Pretty_Printer;
    package Compiler is
      for Switches ("ada") use ("-gnata","-gnatwa" );
    end Compiler;