Undo replacements for SubsystemBase (#620)

Matches wpilibsuite/allwpilib#5634

Author: sciencewhiz

vscode-wpilib/resources/cpp_replacements.json

@@ -48,9 +48,7 @@
       { "from": "wpi[\\\\/]span", "to": "span" },
       { "from": "wpi::span<", "to": "std::span<" },
       { "from": "frc2::CommandBase", "to": "frc2::Command" },
-      { "from": "frc2::SubsystemBase", "to": "frc2::Subsystem" }
-      { "from": "frc2[\\\\/]command[\\\\/]CommandBase[.]h", "to": "frc2/command/Command.h" },
-      { "from": "frc2[\\\\/]command[\\\\/]SubsystemBase[.]h", "to": "frc2/command/Subsystem.h" }
+      { "from": "frc2[\\\\/]command[\\\\/]CommandBase[.]h", "to": "frc2/command/Command.h" }
     ]
   }
 ]

vscode-wpilib/resources/java_replacements.json

@@ -139,8 +139,7 @@
       { "from": "Preferences[.]getInstance[(][)][.]", "to": "Preferences." },
       { "from": "SendableRegistry[.]getInstance[(][)][.]", "to": "SendableRegistry." },
       { "from": "[.]get(\\w*)[(](?:GenericHID[.])?Hand[.]k(\\w*)[)]", "to": ".get$2$1()" },
-      { "from": "CommandBase", "to": "Command" },
-      { "from": "SubsystemBase", "to": "Subsystem" }
+      { "from": "CommandBase", "to": "Command" }
     ]
   }
 ]