[ITEMS/pyutest_tools] Stop using maxlevel and level for determining

whether a block can be mined or not

mods/ITEMS/pyutest_tools/tools.lua

@@ -3,7 +3,6 @@ PyuTest.make_tool("pyutest_tools:wooden_pickaxe", "Wooden Pickaxe", {}, "pyutest
   tool_capabilities = PyuTest.tool_caps({
     uses = 69,
     attack_uses = 69 / 2,
-    maxlevel = 1,
     groupcaps = {
       cracky = {
         times = {
@@ -20,7 +19,6 @@ PyuTest.make_tool("pyutest_tools:stone_pickaxe", "Stone Pickaxe", {}, "pyutest-s
   tool_capabilities = PyuTest.tool_caps({
     uses = 274,
     attack_uses = 274 / 2,
-    maxlevel = 2,
     groupcaps = {
       cracky = {
         times = {
@@ -37,7 +35,6 @@ PyuTest.make_tool("pyutest_tools:iron_pickaxe", "Iron Pickaxe", {}, "pyutest-iro
   tool_capabilities = PyuTest.tool_caps({
     uses = 689,
     attack_uses = 689 / 2,
-    maxlevel = 3,
     groupcaps = {
       cracky = {
         times = {
@@ -54,7 +51,6 @@ PyuTest.make_tool("pyutest_tools:diamond_pickaxe", "Diamond Pickaxe", {}, "pyute
   tool_capabilities = PyuTest.tool_caps({
     uses = 1345,
     attack_uses = 1345 / 2,
-    maxlevel = 3,
     groupcaps = {
       cracky = {
         times = {