User guide: fix error in estimation MOD file (only in the text, not in the...

User guide: fix error in estimation MOD file (only in the text, not in the accompanying files); with steady/check, it fails because paremeters are not initialized

doc/userguide/ch-estbase.tex

@@ -174,9 +174,6 @@ initval;\\
   e = 0;\\
 end;\\
 \\
-steady;\\
-check;\\
-\\
 estimated\_params;\\
 alpha, beta\_pdf, 0.35, 0.02; \\ 
 beta, beta\_pdf, 0.99, 0.002; \\