Simplify memory.x by adding link-rp.x to cargo rustflags. Closes #1.

.cargo/config.toml

@@ -6,6 +6,7 @@ runner = "probe-run --chip RP2040"  # "elf2uf2-rs -d"
 rustflags = [
     "-C", "link-arg=--nmagic",
     "-C", "link-arg=-Tlink.x",
+    "-C", "link-arg=-Tlink-rp.x",
     "-C", "link-arg=-Tdefmt.x",
     "-C", "linker=flip-link",
     "-C", "inline-threshold=5",

memory.x

@@ -3,13 +3,3 @@ MEMORY {
     FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
     RAM   : ORIGIN = 0x20000000, LENGTH = 256K
 }
-
-EXTERN(BOOT2_FIRMWARE)
-
-SECTIONS {
-    /* ### Boot loader */
-    .boot2 ORIGIN(BOOT2) :
-    {
-        KEEP(*(.boot2));
-    } > BOOT2
-} INSERT BEFORE .text;