Remove empty url fields (#25181)

keyboards/40percentclub/25/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "The 5x5 Keyboard",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/4pack/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "4pack",
     "manufacturer": "40percentclub",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/4x4/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "The 4x4 Keyboard",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/5x5/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "The 5x5 Keyboard",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/6lit/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "The 6lit Macropad",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/foobar/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "The foobar Keyboard",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/gherkin/info.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "Gherkin",
   "manufacturer": "40 Percent Club",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",

keyboards/40percentclub/half_n_half/keyboard.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "half_n_half",
   "manufacturer": "di0ib",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",

keyboards/40percentclub/i75/info.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "i75",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
         "vid": "0x4025",

keyboards/40percentclub/luddite/keyboard.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "Luddite",
   "manufacturer": "di0ib",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",

keyboards/40percentclub/mf68/keyboard.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "MF68",
   "manufacturer": "di0ib",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",

keyboards/40percentclub/nano/keyboard.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "Nano",
   "manufacturer": "di0ib",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",

keyboards/40percentclub/nori/keyboard.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "The nori Keyboard",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "qmk",
     "usb": {
       "vid": "0x4025",

keyboards/40percentclub/polyandry/info.json

@@ -1,7 +1,6 @@
 {
     "keyboard_name": "Polypad",
     "manufacturer": "di0ib",
-    "url": "",
     "maintainer": "QMK",
     "features": {
         "bootmagic": true,

keyboards/40percentclub/tomato/keyboard.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "Tomato",
   "manufacturer": "40 Percent Club",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",

keyboards/40percentclub/ut47/keyboard.json

@@ -1,7 +1,6 @@
 {
   "keyboard_name": "ut47",
   "manufacturer": "40percent.club",
-  "url": "",
   "maintainer": "qmk",
   "usb": {
     "vid": "0x4025",