Merge wpiformat configs (#8365)

After replacing the remaining include guards with `#pragma once`, I was
able to merge all the wpiformat configs into one file in the repo root.
This should make the config easier to reason about and maintain in the
future.

cscore/src/main/native/linux/UsbCameraBuffer.hpp

@@ -2,8 +2,7 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#ifndef CSCORE_USBCAMERABUFFER_HPP_
-#define CSCORE_USBCAMERABUFFER_HPP_
+#pragma once
 
 #include <sys/mman.h>
 
@@ -51,5 +50,3 @@ class UsbCameraBuffer {
 };
 
 }  // namespace wpi::cs
-
-#endif  // CSCORE_USBCAMERABUFFER_HPP_

cscore/src/main/native/linux/UsbCameraImpl.hpp

@@ -2,8 +2,7 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#ifndef CSCORE_USBCAMERAIMPL_HPP_
-#define CSCORE_USBCAMERAIMPL_HPP_
+#pragma once
 
 #include <linux/videodev2.h>
 
@@ -178,5 +177,3 @@ class UsbCameraImpl : public SourceImpl {
 };
 
 }  // namespace wpi::cs
-
-#endif  // CSCORE_USBCAMERAIMPL_HPP_

cscore/src/main/native/linux/UsbCameraProperty.hpp

@@ -2,8 +2,7 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#ifndef CSCORE_USBCAMERAPROPERTY_HPP_
-#define CSCORE_USBCAMERAPROPERTY_HPP_
+#pragma once
 
 #include <linux/videodev2.h>
 
@@ -74,5 +73,3 @@ class UsbCameraProperty : public PropertyImpl {
 };
 
 }  // namespace wpi::cs
-
-#endif  // CSCORE_USBCAMERAPROPERTY_HPP_

cscore/src/main/native/linux/UsbUtil.hpp

@@ -2,8 +2,7 @@
 // Open Source Software; you can modify and/or share it under the terms of
 // the WPILib BSD license file in the root directory of this project.
 
-#ifndef CSCORE_USBUTIL_HPP_
-#define CSCORE_USBUTIL_HPP_
+#pragma once
 
 #include <string>
 
@@ -20,5 +19,3 @@ int CheckedIoctl(int fd, unsigned long req, void* data,  // NOLINT(runtime/int)
   CheckedIoctl(fd, req, data, #req, __FILE__, __LINE__, true)
 
 }  // namespace wpi::cs
-
-#endif  // CSCORE_USBUTIL_HPP_