Remove spiflash debug printouts

The SPI flash simulation model prints some random offsets
in the flash. Remove it.
diff --git a/verilog/dv/caravel/spiflash.v b/verilog/dv/caravel/spiflash.v
index 8bf286c..1917933 100644
--- a/verilog/dv/caravel/spiflash.v
+++ b/verilog/dv/caravel/spiflash.v
@@ -105,15 +105,8 @@
 	reg [7:0] memory [0:16*1024*1024-1];
 
 	initial begin
-		$display("Memory 5 bytes = 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x",
-			memory[1048576], memory[1048577], memory[1048578],
-			memory[1048579], memory[1048580]);
 		$display("Reading %s",  FILENAME);
 		$readmemh(FILENAME, memory);
-		$display("%s loaded into memory", FILENAME);
-		$display("Memory 5 bytes = 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x",
-			memory[1048576], memory[1048577], memory[1048578],
-			memory[1048579], memory[1048580]);
 	end
 
 	task spi_action;